fix(build): Make docker-buildx target compatible with podman

Signed-off-by: Kristian Da Costa Menezes <[email protected]>

Author: kdacosta0

Makefile

@@ -189,13 +189,18 @@ docker-push: ## Push docker image with the manager.
 PLATFORMS ?= linux/arm64,linux/amd64,linux/s390x,linux/ppc64le
 .PHONY: docker-buildx
 docker-buildx: ## Build and push docker image for the manager for cross-platform support
+ifeq ($(CONTAINER_TOOL),podman)
+	$(CONTAINER_TOOL) build --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile .
+	$(CONTAINER_TOOL) push ${IMG}
+else
 	# copy existing Dockerfile and insert --platform=${BUILDPLATFORM} into Dockerfile.cross, and preserve the original Dockerfile
 	sed -e '1 s/\(^FROM\)/FROM --platform=\$$\{BUILDPLATFORM\}/; t' -e ' 1,// s//FROM --platform=\$$\{BUILDPLATFORM\}/' Dockerfile > Dockerfile.cross
 	- $(CONTAINER_TOOL) buildx create --name project-v3-builder
 	$(CONTAINER_TOOL) buildx use project-v3-builder
 	- $(CONTAINER_TOOL) buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile.cross .
 	- $(CONTAINER_TOOL) buildx rm project-v3-builder
 	rm Dockerfile.cross
+endif
 
 .PHONY: build-installer
 build-installer: manifests generate kustomize ## Generate a consolidated YAML with CRDs and deployment.